Ruisseau· 4 segments
一ノ沢
Crosses 4 administrative regions : Azumino, Matsumoto, Nagano, Ōmachi
Total length
56km
Max discharge
1,1m³/s
Max Strahler
2
Segments matched
4
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
8 intersecting protected areas
Chubusangaku
IUCN IINational Park
Kita alps
IUCN IVNational Wildlife Protection Area
Myokotogakushirenzan
IUCN IINational Park
Biocenosis Protected Forest
Amakazari and Togakushi
IUCN VGreen Corridor
Okususobana
IUCN IVPrefectural Wildlife Protection Area
Okususobanakyo
IUCN IVPrefectural Wildlife Protection Area
Togakushiyama
IUCN IVBiocenosis Protected Forest
1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
224 distinct species · 374 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de 一ノ沢 : 15 espèces reliées par 15 interactions GloBI sur 5 types (connectance 11.0%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
56km
Max discharge
1,1m³/s
Max Strahler
2
Segments matched
4
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.